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GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

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#############################################################################
##
##  ModulesForHomalg.gi         Modules package              Mohamed Barakat
##
##  Copyright 2007-2010, Mohamed Barakat, University of Kaiserslautern
##
##  Implementation stuff for ModulesForHomalg.
##
#############################################################################

####################################
#
# global variables:
#
####################################

# a central place for configuration variables:

InstallValue( HOMALG_MODULES,
        rec(
            category := rec(
                            ## do not place records here as they won't be copied
                            ## when this record is shallow-copied in HomalgCategory
                            description := "f.p. modules and their maps over computable rings",
                            short_description := "_for_fp_modules",
                            MorphismConstructor := HomalgMap,
                            TryPostDivideWithoutAids := true, # see homalg/ToolFunctors.gi
                            InternalHom := Hom,
                            InternalExt := Ext,
                            ),
            
            ByASmallerPresentationDoesNotDecideZero := false,
            
            Intersect_uses_ReducedBasisOfModule := true,
            
            ### will be set upon first call of VariableForHilbertPolynomial( );
            ### setting it during package loading caused ReadTest("tst/ratfun.tst") to fail:
            ## variable_for_Hilbert_polynomial := Indeterminate( Rationals, "s" ),
            
            DimensionOfZeroModules := -1,
            
           )
);